#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

int main(int argc, char **argv)
{
  char *file;
  char *host;

  if(argc < 3) {
    printf("%s file host\n\tsends file to host if you have access to it\n", argv[0]);
    exit(1);
  }

  file = argv[1];
  host = argv[2];

  if(access(argv[1], R_OK) == 0) {
    int fd;
    int ffd;
    int rc;
    struct sockaddr_in sin;
    char buffer[4096];

    printf("Connecting to %s:18211 .. ", host); fflush(stdout);

    fd = socket(AF_INET, SOCK_STREAM, 0);

    memset(&sin, 0, sizeof(struct sockaddr_in));
    sin.sin_family = AF_INET;
    sin.sin_addr.s_addr = inet_addr(host);
    sin.sin_port = htons(18211);

    if(connect(fd, (void *)&sin, sizeof(struct sockaddr_in)) == -1) {
      printf("Unable to connect to host %s\n", host);
      exit(EXIT_FAILURE);
    }

#define HITHERE ".oO Oo.\n"
    if(write(fd, HITHERE, strlen(HITHERE)) == -1) {
      printf("Unable to write banner to host %s\n", host);
      exit(EXIT_FAILURE);
    }
#undef HITHERE

    printf("Connected!\nSending file .. "); fflush(stdout);

    ffd = open(file, O_RDONLY);
    if(ffd == -1) {
      printf("Damn. Unable to open file\n");
      exit(EXIT_FAILURE);
    }

    rc = read(ffd, buffer, sizeof(buffer));
    if(rc == -1) {
      printf("Unable to read from file: %s\n", strerror(errno));
      exit(EXIT_FAILURE);
    }

    write(fd, buffer, rc);

    printf("wrote file!\n");

  } else {
    printf("You don't have access to %s\n", file);
  }
}

